Bushing press-fitting device

Abstract

The present invention relates to a bushing pressing device, which includes a frame, an in-machine roller for conveying a cylinder body is provided at the lower part of the frame, a lifting mechanism for lifting the cylinder body is provided below the in-machine roller, a lifting window is provided on the in-machine roller corresponding to the lifting mechanism, and a blocking mechanism for positioning the cylinder body is provided on the in-machine roller; a bushing feeding mechanism is provided on the frame above the lifting mechanism; a pressing mechanism corresponding to a bushing pressing head and a transverse movement mechanism for driving the pressing mechanism to move transversely are provided on one side of the bushing feeding mechanism, and a supporting mechanism for supporting the cylinder body is provided on the other side; the pressing mechanism includes a pressing rod and a pressing driving mechanism for driving the pressing rod to press the bushing pressing head. The bushing pressing device realizes high-precision and automated installation of bushings, and there will be no problem of insufficient installation during bushing installation, thereby greatly improving production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of camshaft bushing installation, and in particular to a bushing press-fitting device. Background Art

[0002] The engine camshaft is a vital component in a piston engine, controlling the opening and closing of the valves. Since the camshaft rotates at a very high speed during engine operation and must withstand significant torque, this results in significant friction between the camshaft and the camshaft hole, making the engine susceptible to wear and damage at the camshaft hole. To prevent wear at the camshaft hole, a bushing made of a wear-resistant material is typically installed in the camshaft hole to reduce direct friction between the camshaft and the hole, and to facilitate replacement of the bushing if worn. Currently, when installing bushings in cylinder blocks with a large number of camshaft holes, machine failures and other factors can lead to insufficient bushings or improper installation of the camshaft holes. Since the installation space within the cylinder block is very small, all installed bushings need to be removed and reinstalled, significantly reducing production efficiency and causing the removed bushings to be scrapped. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a bushing press-fitting device with high installation precision, low failure rate and high production efficiency.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is:

[0005] A bushing press-fitting device comprises a frame, an inner roller conveyor for conveying a cylinder body is provided at the lower portion of the frame, a lifting mechanism for lifting the cylinder body is provided below the inner roller conveyor, a lifting window is provided on the inner roller conveyor corresponding to the lifting mechanism, and a blocking mechanism for positioning the cylinder body is provided on the inner roller conveyor;

[0006] A bushing feeding mechanism is provided on the frame above the jacking mechanism, and the bushing feeding mechanism includes a plurality of telescopic feeding arms arranged in an array and a bushing pressing head provided at the lower end of the telescopic feeding arm for loading the bushing, the bushing pressing head is laterally slidably engaged with the end of the telescopic feeding arm, and an elastic component is provided between the bushing pressing head and the telescopic feeding arm to automatically reset the bushing pressing head;

[0007] On one side of the bushing feeding mechanism, a pressing mechanism corresponding to the bushing pressing head and a transverse movement mechanism for driving the pressing mechanism to move transversely are provided on the frame, and a supporting mechanism for supporting the cylinder body is provided on the other side; the pressing mechanism includes a pressing rod and a pressing driving mechanism for driving the pressing rod to press the bushing pressing head.

[0008] As an embodiment of the present invention, the telescopic feeding arm includes a first telescopic member fixedly mounted on the upper portion of the frame, a joint seat connected to the lower end of the first telescopic member, and a bushing mounting bracket fixed to the lower end of the joint seat, wherein a third guide sleeve is provided at the lower end of the bushing mounting bracket, and the bushing pressure head is mounted in the third guide sleeve;

[0009] A feeding guide mechanism is provided between the joint seat and the first telescopic member, and the feeding guide mechanism includes a plurality of lifting guide rods fixedly mounted on the upper part of the joint seat and a feeding limit plate fixedly connected to the upper ends of the plurality of lifting guide rods. The feeding limit plate can be slid up and down on the first telescopic member, and a limiting column is fixedly provided at the bottom of the feeding limit plate.

[0010] As an embodiment of the present invention, a pressure head guide rod adapted to the third guide sleeve is coaxially fixed on the bushing pressure head; the elastic component is arranged between the third guide sleeve and the bushing pressure head, and the elastic component includes a first spring connected at both ends to the third guide sleeve and the bushing pressure head respectively, and a press-fitting limiting mechanism arranged between the third guide sleeve and the bushing pressure head, and a plurality of first springs are evenly arranged circumferentially.

[0011] As an embodiment of the present invention, a baffle is provided at one end of the bushing pressure head close to the third guide sleeve, and a through hole, a detection hole and a positioning hole are provided on the cylindrical surface of the bushing pressure head, and the positioning hole is provided at the inner edge of the baffle;

[0012] A cylindrical pin is arranged in the positioning hole; a positioning component is arranged in the through hole; and a probe rod cylinder corresponding to the detection hole is arranged on the side of the bushing mounting frame.

[0013] As an embodiment of the present invention, a feed arm mounting bracket is fixedly provided on the upper part of the frame, the first telescopic part is fixedly provided on the feed arm mounting bracket, and a linear bearing corresponding to the lifting guide rod is fixedly provided on the feed arm mounting bracket; the feed arm mounting bracket is provided with an in-place detection mechanism for detecting the position of the feed limit plate.

[0014] As an embodiment of the present invention, the in-place detection mechanism includes a detection block arranged on the side of the feeding limit plate and a feeding detection device corresponding to the detection block, and the feeding detection device is arranged on the frame at a position corresponding to the upper and lower ends of the first telescopic member.

[0015] As an embodiment of the present invention, the roller conveyor in the machine includes two roller shaft frames arranged in parallel and short-axis rollers arranged on the inner sides of the two roller shaft frames, a support sleeve corresponding to the roller shaft of the short-axis roller is fixedly provided on the inner side of the roller shaft frame, and a sprocket is fixedly provided on the outer end of the roller shaft; the gap between the short-axis rollers on the two roller shaft frames forms the jacking window.

[0016] As an embodiment of the present invention, the support mechanism includes a support frame fixed on the frame, a support plate arranged on the inner side of the support frame, a driving slider arranged between the support frame and the support plate, and a support driving mechanism for driving the support plate to move vertically. An elastic reset mechanism is provided between the support plate and the support frame, and the opposing surfaces between the support plate and the driving slider are inclined planes that are fitted together; when the driving slider moves vertically, it drives the support plate to move horizontally.

[0017] As an embodiment of the present invention, the elastic reset mechanism includes a plurality of wedge guide shafts fixed on the side of the support plate, and a fourth guide sleeve corresponding to the wedge guide shaft is provided on the support frame. After the wedge guide shaft passes through the fourth guide sleeve, a third spring is provided on the outside.

[0018] As an embodiment of the present invention, the jacking mechanism includes a lifting mechanism and a lifting guide mechanism arranged at the lower part of the frame, a lifting plate is installed on the top of the lifting mechanism, and the lifting guide mechanism includes a plurality of jacking guide rods fixedly arranged at the bottom of the jacking plate and a jacking guide seat fixedly arranged on the frame and corresponding to the jacking guide rods, a detection ring is provided at the lower end of the jacking guide rod, and a jacking detection device for detecting the position of the detection ring is provided on the frame.

[0019] The beneficial effects of adopting the above technical solution are:

[0020] The bushing pressing device provided by the present invention first manually sets the bushing on the bushing pressure head, positions the bushing by means of the positioning column and the cylindrical pin, and detects whether the bushing is installed correctly by means of the probe cylinder. After all bushings are installed correctly, the bushing feeding mechanism controls the bushing to retract upward; the cylinder body is transported from the first roller conveyor in the machine to the second roller conveyor in the machine until the blocking mechanism blocks the cylinder body. At the same time, the photoelectric switch on the photoelectric switch seat detects whether there is material, and the fourth proximity switch detects whether the cylinder body is in place; then the cylinder body is lifted up by the jacking mechanism, the bottom of the cylinder body is positioned and the pin entry is detected by the lower positioning pin and the first stroke switch. After the cylinder body rises into place, the top of the cylinder body is positioned and the pin entry is detected by the upper positioning pin and the third proximity switch; then the telescopic cylinder in the support mechanism retracts, driving the driving slider to rise, and under the action of the inclined surface between the support plate and the driving slider, the support frame will move outward to realize the tightening of the cylinder body, and cooperate with the second stroke switch to detect whether the cylinder body is in contact with the support limit block on the support plate. Fit; then the rightmost feeding cylinder extends downward to make the bushing pressure head coincide with the axis of the pressure rod, start the screw mechanism, make the bushing pressure head reach the left side of the camshaft hole on the rightmost side of the cylinder body, start the electric cylinder to move the pressure rod to the right, and press the bushing into the camshaft hole on the rightmost side of the cylinder body through the bushing pressure head, and record the pressure displacement curve, and the rightmost feeding cylinder retreats upward; the electric cylinder controls the pressure rod to reset to the left, and controls the bushing pressure head to the left side of the second camshaft hole from right to left through the screw mechanism, and the second camshaft hole from right to left The first feeding cylinder extends downward to make the bushing pressure head coincide with the axis of the pressure rod, and the electric cylinder is started to move the pressure rod to the right. The bushing is pressed into the second camshaft hole from right to left through the bushing pressure head, and the pressure displacement curve is recorded. The feeding cylinder retreats upward; the remaining bushings are press-fitted in sequence; after the press-fitting is completed, the transverse mechanism is reset, and the telescopic cylinder in the support mechanism controls the driving slider to move downward. Under the action of the third spring, the support plate is reset, and the lifting mechanism controls the lifting plate to descend and reset, and the cylinder body is transported to the next process.

[0021] The bushing press-fitting device achieves high-precision and automated installation of the bushing through the coordination of the roller table, jacking mechanism, supporting mechanism, transverse movement mechanism, press-fitting mechanism, bushing feeding mechanism and various detection switches in the machine. The bushing will not be under-installed during installation, and the production efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure when viewed from above after the base frame and columns are removed.

[0024] Figure 3 yes Figure 2 A partial enlarged schematic diagram of point A in the middle.

[0025] Figure 4It is a schematic diagram of the top view of the structure of the present invention after removing the base frame and the columns.

[0026] Figure 5 yes Figure 4 A partial enlarged schematic diagram of point B in the middle.

[0027] Figure 6 It is a structural schematic diagram of the jacking mechanism in the present invention.

[0028] Figure 7 It is a structural schematic diagram of the second roller table in the present invention.

[0029] Figure 8 It is a front view structural diagram of the transverse movement mechanism, press-fitting mechanism, bushing feeding mechanism and supporting mechanism in the present invention.

[0030] Figure 9 It is a schematic top view of the structure of the transverse movement mechanism, the press-fitting mechanism, the bushing feeding mechanism and the supporting mechanism in the present invention.

[0031] Figure 10 It is a structural schematic diagram of the bushing feeding mechanism and the supporting mechanism in the present invention.

[0032] Figure 11 It is a structural diagram of the bushing feeding mechanism in the present invention.

[0033] Figure 12 It is a structural schematic diagram of the telescopic feeding arm and the bushing mounting frame in the present invention.

[0034] Figure 13 It is a structural schematic diagram of the third guide sleeve, the bushing pressure head and the bushing in the present invention.

[0035] Figure 14 yes Figure 13 Schematic diagram of the cross-sectional structure at AA in the middle.

[0036] Figure 15 It is a structural schematic diagram of the third guide sleeve and the elastic component in the present invention.

[0037] Figure 16 It is a schematic diagram of the exploded structure of the third guide sleeve, bushing pressure head and elastic component from the left side of the present invention.

[0038] Figure 17 It is a right-side exploded structural diagram of the third guide sleeve, bushing pressure head and elastic component in the present invention.

[0039] Figure 18 It is a left-side structural schematic diagram of the support mechanism in the present invention.

[0040] Figure 19 It is a front view structural schematic diagram of the support mechanism in the present invention.

[0041] Figure 20 It is a right side structural schematic diagram of the support mechanism in the present invention after removing the support frame.

[0042] Figure 21 It is a front view structural schematic diagram of the support mechanism of the present invention after removing the support frame.

[0043] : 1 chassis, 2 chassis panel, 3 column, 4 top plate, 5 first machine roller, 6 second machine roller, 7 long axis roller, 8 first motor, 9 guide mounting plate, 10 limit rod mounting block, 11 guide limit rod, 12 adjustment mechanism, 1201 guide seat, 1202 first guide column, 1203 adjustment seat, 1204 second guide column, 1205 fixed block, 13 short axis roller, 1301 roller, 1302 support sleeve, 1303 double sprocket, 14 blocking mounting plate, 15 first guide sleeve, 16 connecting plate, 17 blocking cylinder rod, 18 blocking cylinder, 19 blocking rod, 20 blocking block, 21 photoelectric switch seat, 22 lifting mounting plate, 23 lifting cylinder, 24 lifting cylinder rod 、25 jacking guide seat、26 jacking guide rod、27 detection ring、28 switch mounting plate、29 jacking in place switch、30 speed conversion switch、31 jacking original position switch、32 jacking plate、33 jacking pad、34 make way slot、35 lower positioning pin、36 first stroke switch、37 electric cylinder mounting seat、3701 screw nut seat、38 electric cylinder、39 floating seat、40 first guide rod、41 second guide sleeve、42 pressure rod、43 pressure rod head、44 support seat、4401 support sleeve、45 first slider、46 first guide rail、47 translation mounting seat、48 screw、49 reducer、50 reducer seat、51 translation limit block、52 feeding arm mounting bracket、5201 feeding arm mounting plate、53 jacking Surface pad, 54 feeding arm mounting block, 55 supporting arm, 56 switch base plate, 57 first proximity switch, 58 feeding cylinder, 59 lifting guide rod, 60 linear bearing, 61 joint seat, 62 feeding limit plate, 6201 limit column, 63 first limit screw, 64 bushing mounting frame, 65 third guide sleeve, 6501 first through hole, 6502 second through hole, 66 bushing pressure head, 67 baffle, 68 pressure head guide rod, 69 cutting plane, 70 third through hole, 71 fourth through hole, 72 through hole, 73 detection hole, 74 positioning hole, 7401 cylindrical pin, 75 pin shaft, 76 first hook, 77 second hook, 78 first spring, 79 adjusting nut, 80 second spring, 81 positioning column, 82 bushing, 8201 notch, 83 support frame, 84 support plate, 8401 second limit screw, 85 support limit block, 86 drive slider, 87 telescopic cylinder, 8701 telescopic cylinder rod, 88 second slider, 89 second guide rail, 90 slider limit plate, 91 wedge guide shaft, 92 locking washer, 93 fourth guide sleeve, 94 third spring, 95 support switch seat, 96 second travel switch, 97 second proximity switch, 98 travel switch pressure plate, 99 upper positioning pin, 100 third proximity switch, 101 fourth proximity switch, 102 probe rod cylinder support, 103 probe rod cylinder, 104 probe rod cylinder rod, 105 diffuse reflection photoelectric switch, 106 fifth proximity switch, 107 detection piece. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clear, the invention is clearly and completely described below in conjunction with specific embodiments.

[0045] like Figures 1-4 、 Figure 8 The bushing press-fitting device shown in the figure includes a frame and an in-machine roller, a transverse movement mechanism, a lifting mechanism, a bushing feeding mechanism and a support mechanism arranged on the frame. The frame includes a base frame 1 and a top plate 4 arranged on the base frame 1 through a column 3. The base frame 1 is provided with an in-machine roller, and the cylinder body is conveyed by the in-machine roller. A lifting mechanism for lifting the cylinder body is provided below the in-machine roller. A lifting window is provided on the in-machine roller corresponding to the lifting mechanism. The in-machine roller is provided with a blocking mechanism for positioning the cylinder body.

[0046] A bushing feeding mechanism is provided on the top plate 4 just above the jacking mechanism. The bushing feeding mechanism comprises a plurality of telescopic feeding arms arranged side by side in an array and a bushing pressing head 66 provided at the lower end of the telescopic feeding arm for loading the bushing 82. The bushing pressing head 66 is laterally slidably engaged with the end of the telescopic feeding arm. An elastic component is provided between the bushing pressing head 66 and the telescopic feeding arm to automatically reset the bushing pressing head 66.

[0047] On one side of the bushing feeding mechanism, a pressing mechanism corresponding to the bushing pressing head 66 and a transverse movement mechanism for driving the pressing mechanism to move transversely are provided on the frame, and a supporting mechanism for supporting the cylinder body is provided on the other side; the pressing mechanism includes a pressing rod 42 and a pressing driving mechanism for driving the pressing rod 42 to press the bushing pressing head 66.

[0048] The axis of the bushing pressure head 66 is parallel to that of the pressure rod 42. A pressure rod head 43 corresponding to the bushing pressure head 66 is provided at the right end of the pressure rod 42. The pressure rod head 43 has the same outer diameter as the pressure head guide rod 68. The pressure rod 42 can move left and right under the action of the top pressure driving mechanism, so that the bushing 82 can be pressed into the camshaft hole of the cylinder body.

[0049] like Figures 8-12 As shown, in this embodiment, a translation mounting seat 47 is fixedly provided at the lower left side of the top plate 4, and a feed arm mounting frame 52 is fixedly provided at the lower right side. The transverse movement mechanism is provided on the translation mounting seat 47, and the bushing feeding mechanism is provided on the feed arm mounting frame 52. Specifically, the telescopic feed arm includes a first telescopic member fixedly mounted on the upper portion of the frame, a joint seat 61 connected to the lower end of the first telescopic member, and a bushing mounting frame 64 fixed to the lower end of the joint seat 61. A third guide sleeve 65 is provided at the lower end of the bushing mounting frame 64, and the bushing pressing head 66 is mounted within the third guide sleeve 65.

[0050] A feeding guide mechanism is provided between the joint seat 61 and the first telescopic member, and the feeding guide mechanism includes a plurality of lifting guide rods 59 whose lower ends are fixed to the upper part of the joint seat 61 and a feeding limit plate 62 fixed to the upper ends of the plurality of lifting guide rods 59. The feeding limit plate 62 is slidably mounted on the first telescopic member. Two limit columns 6201 are symmetrically fixed to the bottom of the feeding limit plate 62 with respect to the first telescopic member. The limit columns 6201 cooperate with the upper surface of the feeding arm mounting block 54 to prevent the third guide sleeve 65 from descending too low and damaging the cylinder body.

[0051] In this embodiment, the first telescopic member is a feed cylinder 58. The lower end of the feed cylinder rod of the feed cylinder 58 is connected to the joint seat 61. The feed cylinder 58 drives the bushing 82 up and down to perform the press-fit operation. The multiple feed cylinders 58 are mounted on the feed arm mounting plate 5201 via the feed arm mounting block 54. The feed arm mounting plate 5201 is removably mounted on the feed arm mounting frame 52. Two linear bearings 60 corresponding to the lifting guide rods 59 are mounted on the lower portion of the feed arm mounting block 54, on either side of the feed cylinder 58.

[0052] The feed arm mounting frame 52 is provided with an in-position detection mechanism for detecting the position of the feed limit plate 62. The in-position detection mechanism includes a detection block provided on the side of the feed limit plate 62 and a feed detection device corresponding to the detection block. The feed detection device is provided on the frame at positions corresponding to the upper and lower ends of the first telescopic member. Specifically, the detection block is a first limit screw 63 provided on the feed limit plate 62, and the feed detection device is a first proximity switch 57 provided at both the upper and lower ends of the feed cylinder 58 and corresponding to the first limit screw 63. Two elongated switch plate seats 56 are provided on the feed arm mounting frame 52 along the arrangement direction of the multiple feed cylinders 58. The two switch plate seats 56 are fixed to the feed arm mounting block 54 via multiple support arms 55. The first proximity switch 57 is installed on the switch plate seat 56 via an elongated hole and a fastening nut. The upper and lower stop positions of the third guide sleeve 65 are positioned by the first proximity switch 57. When the first proximity switch 57 at the lower end detects the first limit screw 63, the bushing pressure head 66 coincides with the axis of the pressure rod head 43. When the first proximity switch 57 at the upper end detects the first limit screw 63, the bushing pressure head 66 returns to its original position.

[0053] like Figure 13-17As shown, in this embodiment, a pressure head guide rod 68 adapted to the third guide sleeve 65 is coaxially fixed on the bushing pressure head 66; the elastic component is arranged between the third guide sleeve 65 and the bushing pressure head 66, and the elastic component includes a first spring 78 whose two ends are respectively connected to the third guide sleeve 65 and the bushing pressure head 66, and a press-fitting limiting mechanism arranged between the third guide sleeve 65 and the bushing pressure head 66, and a plurality of first springs 78 are evenly arranged circumferentially.

[0054] Specifically, the axis of the third guide sleeve 65 is parallel to the axis of the pressure rod 42, and the elastic component further includes a plurality of first through holes 6501 and second through holes 6502 uniformly arranged circumferentially on the third guide sleeve 65; the bushing pressure head 66 is cylindrical, and a third through hole 70 corresponding to the first through hole 6501 and a fourth through hole 71 corresponding to the second through hole 6502 are uniformly arranged circumferentially on its plane; the first through hole 6501 and the third through hole 70 are both countersunk holes, a first hook 76 is provided in the first through hole 6501, and a second hook 77 is provided in the third through hole 70, and the first hook 76 and the second hook 77 are connected together by a first spring 78, so that in a natural state, the bushing pressure head 66 and the third guide sleeve 65 are fitted together;

[0055] The press-fitting limiting mechanism includes a pin shaft 75 fixed in the fourth through hole 71 , and the pin shaft 75 passes through the second through hole 6502 . The press-fitting limiting mechanism is provided to prevent relative rotation between the third guide sleeve 65 and the bushing pressing head 66 .

[0056] The outer diameter of the bushing press head 66 is adapted to the inner diameter of the bushing 82. A baffle 67 is provided on the bushing press head 66 at one end close to the third guide sleeve 65 to support the bushing 82 when it is press-fitted. A through hole 72, a detection hole 73 and a positioning hole 74 are provided on the cylindrical surface of the bushing press head 66. The positioning hole 74 is provided at the inner edge of the baffle 67. The through hole 72 and the positioning hole 74 are provided along the radial direction of the bushing press head 66.

[0057] A cylindrical pin 7401 is provided in the positioning hole 74 and corresponds to the notch 8201 on the bushing 82;

[0058] A positioning assembly is provided in the through hole 72, comprising an adjusting nut 79, a second spring 80, and a positioning post 81, which are sequentially arranged in the through hole 72. The outer end surface of the positioning post 81 is spherical. One end of the through hole 72 is provided with an internal thread that matches the external thread of the cylindrical surface of the adjusting nut 79, and the other end is tapered or stepped. The positioning post 81 is limited in the through hole 72 by the tapered or stepped through hole end, and the second spring 80 is in a compressed state. When the other end of the through hole 72 is stepped, the positioning post 81 is provided with a corresponding shaft shoulder, so that the positioning post 81 can be limited in the through hole 72.

[0059] A probe cylinder 103 is mounted on the side of the bushing mounting frame 64 through a probe cylinder support 102. When the probe cylinder rod of the probe cylinder 103 is extended, it can enter the detection hole 73 to detect whether the bushing 82 is installed in place.

[0060] A cutting plane 69 is horizontally provided on the upper free end of the pressure head guide rod 68, and a diffuse reflective photoelectric switch 105 corresponding to the cutting plane 69 is installed on the side of the bushing mounting frame 64. When the pressing is completed and the pressure rod head 43 is retracted, it is used to detect whether the pressure head guide rod 68 is reset.

[0061] like Figure 8 and Figure 9 As shown, the transverse movement mechanism includes a screw mechanism and an electric cylinder mounting seat 37 mounted on a translation mounting seat 47, and the electric cylinder mounting seat 37 is connected to the screw in the screw mechanism through a screw nut seat 3701. A plurality of fifth proximity switches 106 are provided on the translation mounting seat 47 along the axial direction of the pressure rod 42, which adopts a corresponding shooting proximity switch. The electric cylinder mounting seat 37 is provided with a detection piece 107 corresponding to the fifth proximity switch 106; there are nine fifth proximity switches 106, and the seven in the middle are respectively used to position the pressure rod head 43. When the detection pieces 107 on the electric cylinder mounting seat 37 reach the positions of the above-mentioned seven fifth proximity switches 106, the pressure rod head 43 is just on the left side of the seven camshaft holes in the cylinder body; the fifth proximity switch 106 located on the left end is the home switch, and the fifth proximity switch 106 located on the right end is the forward limit position switch, which is used to limit the left and right movement limit positions of the electric cylinder mounting seat 37;

[0062] The screw mechanism includes a screw 48 rotatably mounted on a translation mount 47 and a reducer 49 for driving the screw 48. The reducer 49 is mounted on the translation mount 47 via a reducer mount 50. First guide rails 46 are provided along the left-right direction at the front and rear bottoms of the translation mount 47. The electric cylinder mount 37 is slidably suspended on the first guide rails 46 via first sliders 45. The fifth proximity switch 106 is mounted on the front side of the translation mount 47, and the detection plate 107 is mounted on the front side of the electric cylinder mount 37. Translation limit blocks 51 are provided on the left and right ends of the translation mount 47 to limit the position of the electric cylinder mount 37. The pressing drive mechanism comprises an electric cylinder 38 mounted on the electric cylinder mount 37. The telescopic rod of the electric cylinder 38 is connected to the pressing rod 42 via a floating mount 39. A plurality of first guide rods 40 are fixed horizontally on the left side of the floating mount 39. The electric cylinder mount 37 is provided with second guide sleeves 41 corresponding to the first guide rods 40. A support seat 44 is vertically provided at the lower right end of the translation mounting seat 47 , and a support sleeve 4401 corresponding to the pressure rod 42 is provided on the support seat 44 .

[0063] like Figure 10 、 Figures 18-21 As shown, a support mechanism is provided below the top plate 4 of the press-fitting mechanism, to the right of the bushing feeding mechanism. The support plate 84 in the support mechanism can move left and right, and the cylinder body is supported and positioned in the opposite direction by the support plate 84. During the process of pressing the bushing 82 into the camshaft hole, the support mechanism supports the cylinder body to prevent displacement, thereby ensuring the fixed position of the cylinder body during the press-fitting process and the installation accuracy of the bushing 82.

[0064] The support mechanism includes a support frame 83 fixedly arranged at the lower right end of the feeding arm mounting frame 52 on the frame, a support plate 84 arranged on the inner side of the support frame 83, a driving slider 86 arranged between the support frame 83 and the support plate 84, and a support driving mechanism for driving the support plate 84 to move vertically. An elastic reset mechanism is arranged between the support plate 84 and the support frame 83, and the opposing surfaces between the support plate 84 and the driving slider 86 are inclined planes that fit together; when the driving slider 86 moves vertically, it drives the support plate 84 to move horizontally.

[0065] The elastic reset mechanism includes a plurality of wedge guide shafts 91 fixedly mounted on the outer side surface of the support plate 84. A fourth guide sleeve 93 corresponding to the wedge guide shaft 91 is provided on the support frame 83. After the wedge guide shaft 91 passes through the right end of the fourth guide sleeve 93, a third spring 94 is sleeved on the outer side. The third spring 94 is limited on the wedge guide shaft 91 by a locking washer 92. The left end of the third spring 94 presses against the right end of the fourth guide sleeve 93. Under the elastic force of the third spring 94, the support plate 84 is pressed against the driving slider 86. A plurality of support limit blocks 85 are fixedly mounted on the inner side surface of the support plate 84.

[0066] The support drive mechanism comprises a telescopic cylinder 87. A second slider 88 is fixedly mounted to the right of the drive slider 86. A second guide rail 89 corresponding to the second slider 88 is vertically mounted on the support frame 83. The support frame 83 is provided with a telescopic cylinder 87 for driving the drive slider 86 up and down. The plane where the support plate 84 and the support frame 83 meet is an inclined plane with the left side lower and the right side higher. A support switch seat 95 is mounted on the side of the support plate 84 on the support frame 83. A second travel switch 96 and a second proximity switch 97 are mounted on the support switch seat 95. An L-shaped travel switch pressure plate 98 corresponding to the second travel switch 96 is fixedly mounted on the support plate 84. A second limit screw 8401 corresponding to the second proximity switch 97 is also mounted on the support plate 84. The combination of the inclined planes of the support plate 84 and the support frame 83 and the telescopic cylinder 87 enables precise control of the movement of the support plate 84.

[0067] like Figure 1 、 Figure 2 、 Figure 4 and Figure 7 As shown, in this embodiment, the in-machine roller conveyor includes a second in-machine roller conveyor 6 located directly below the bushing feeding mechanism and a first in-machine roller conveyor 5 located on the left side of the second in-machine roller conveyor 6, the two ends of the long-axis roller 7 on the first in-machine roller conveyor 5 are respectively mounted on two roller shaft frames, the two ends of the long-axis rollers 7 on the left and right ends of the second in-machine roller conveyor 6 are respectively mounted on two roller shaft frames, and a short-axis roller 13 for avoiding the jacking mechanism is provided on the inner side of the roller shaft frame in the middle of the second in-machine roller conveyor 6, and the short-axis roller 13 is connected to the roller shaft frame at only one end and supported by a support sleeve 1302, and the other end is suspended in the air, and the gap between the short-axis rollers 13 on the two roller shaft frames forms the jacking window; the ends of multiple long-axis rollers 7 and short-axis rollers 13 are connected together by a sprocket chain assembly, and the synchronous rotation of multiple long-axis rollers 7 is realized under the action of the first motor 8.

[0068] like Figure 2 and Figure 3As shown, a blocking mechanism is provided at the right end of the first inner roller 5 for blocking the cylinder body being transported, and a blocking mechanism and a fourth proximity switch 101 are provided at the right end of the second inner roller 6. The blocking mechanism is used to block the cylinder body being transported from the first inner roller 5, and the fourth proximity switch 101 performs cylinder position detection; a photoelectric switch for detecting whether the cylinder body is in place is installed on the roller shaft frame of the first inner roller 5 and the second inner roller 6 through a photoelectric switch seat 21.

[0069] The blocking mechanism includes a blocking mounting plate 14 fixedly mounted between the two roller frames and a blocking cylinder 18 vertically fixed above the blocking mounting plate 14. The blocking cylinder rod 17 of the blocking cylinder 18 passes through the lower part of the blocking mounting plate 14 and is connected to the horizontally arranged connecting plate 16. A blocking rod 19 is vertically fixed above both ends of the connecting plate 16, and a first guide sleeve 15 corresponding to the blocking rod 19 is provided on the blocking mounting plate 14. A blocking block 20 is fixed on the side of the blocking rod 19 that passes through the first guide sleeve 15 and faces the cylinder body for conveying. When the blocking cylinder 18 contracts, the blocking rod 19 drives the blocking block 20 to rise, thereby blocking the cylinder body.

[0070] like Figure 6 As shown, in this embodiment, the jacking mechanism includes a lifting mechanism and a lifting guide mechanism arranged at the lower part of the frame, the lifting mechanism includes a jacking mounting plate 22 fixed on the chassis panel 2 on the top of the chassis 1, and two jacking cylinders 23 are vertically fixed below the jacking mounting plate 22, and the upper ends of the jacking cylinder rods 24 of the jacking cylinders 23 pass through the jacking mounting plate 22 and are connected to the horizontally arranged jacking plate 32; the lifting guide mechanism includes a plurality of jacking guide rods 26 fixed at the bottom of the jacking plate 32 and a jacking guide seat 25 fixed on the jacking mounting plate 22 corresponding to the jacking guide rods 26; a detection ring 27 is fixed at the lower end of one of the jacking guide rods 26, and a jacking detection device for detecting the position of the detection ring 27 is provided on the frame. The jacking detection device includes a switch mounting plate 28 vertically fixed on one side of the detection ring 27 below the jacking mounting plate 22, and the switch mounting plate 28 is sequentially installed with a jacking in place switch 29, a speed conversion switch 30 and a jacking in place switch 31 from top to bottom. The jacking in place switch 29 and the jacking in place switch 31 are used to position the lifting amplitude of the jacking cylinder 23 and control the lifting height of the jacking plate 32. The lifting speed of the jacking cylinder 23 can be converted by the speed conversion switch 30.

[0071] The upper surface of the jacking plate 32 is provided with a plurality of jacking pads 33, and the upper surface of the jacking plate 32 is provided with a plurality of lower positioning pins 35 corresponding to the cylinder body. The two adjacent side surfaces of the jacking plate 32 are provided with a first stroke switch 36 for detecting the cylinder body, so as to detect the entry of the lower positioning pin 35. A clearance groove 34 is provided at the edge of the jacking plate 32, and the short-axis roller 13 passes through the clearance groove 34 during the lifting and lowering process of the jacking plate 32 to prevent interference. The lower surface of the feeding arm mounting frame 52 is provided with a plurality of top surface pads 53, and the lower surface of the feeding arm mounting frame 52 is provided with a plurality of upper positioning pins 99 corresponding to the cylinder body. The lower surface of the feeding arm mounting frame 52 is provided with a third proximity switch 100 for detecting the cylinder body, so as to detect the entry of the upper positioning pin 99.

[0072] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, guide limit rods 11 are provided on both sides of the first and second machine rollers 5, and a plurality of guide mounting plates 9 are fixed on the inner sides of the roller shaft frames of the first and second machine rollers 5, 6. The inner ends of the guide mounting plates 9 are fixed to the guide limit rods 11 by limit rod mounting blocks 10, so that the spacing between the two guide limit rods 11 is adapted to the width of the cylinder body; a first guide column 1202 is vertically fixed on the second machine roller 6 through a guide seat 1201 which can be adjusted up and down, and a second guide column 1204 is horizontally fixed on the upper part of the first guide column 1202 through an adjustment seat 1203, and the guide limit rod 11 is fixed on the inner side of the second guide column 1204 by a fixing block 1205, so that the height, horizontality and front and rear position of the guide limit rod 11 can be adjusted, and the guide limit rods 11 on the front and rear sides of the second machine roller 6 are staggered up and down.

[0073] Specific working process:

[0074] 1. The cylinder body is first transported to the first roller table 5 in the machine until the blocking mechanism blocks the cylinder body. The photoelectric switch on the photoelectric switch seat 21 detects whether there is material; the workpiece information is read by the barcode scanner and uploaded to the industrial computer;

[0075] 2. The bushing feeding mechanism controls the bushing mounting frame 64 to extend downward. Seven bushings 82 are manually taken from the material frame and mounted on the bushing pressing head 66. Note that the bushings 82 are positioned by using the positioning column 81 and the cylindrical pin 7401 to match the oil hole on the bushing 82.

[0076] 3. Manually press the loading detection operation button, and the probe cylinder rod of the probe cylinder 103 extends to perform a position detection to detect whether the installation posture of the bushing 82 is correct. If the probe cylinder rod does not extend into place, it is determined that the bushing 82 is not loaded correctly. After all bushings 82 are installed correctly, the bushing feeding mechanism controls the bushing 82 to retract upwards;

[0077] 4. Press the control button, and the cylinder body is transported from the first roller conveyor 5 to the second roller conveyor 6 until the blocking mechanism blocks the cylinder body. At the same time, the photoelectric switch on the photoelectric switch seat 21 detects whether there is material, and the fourth proximity switch 101 detects whether the cylinder body is in place;

[0078] 5. Lift the cylinder body by the lifting mechanism, and use the lower positioning pin 35 and the first travel switch 36 to locate the bottom of the cylinder body and detect the pin insertion. After the cylinder body rises to its proper position, use the upper positioning pin 99 and the third proximity switch 100 to locate the top of the cylinder body and detect the pin insertion. At this time, the top surface pad 53 is just in contact with the top of the cylinder body, and there is no interaction force.

[0079] 6. The telescopic cylinder rod 8701 of the telescopic cylinder 87 in the support mechanism retracts, driving the driving slider 86 to rise. Under the action of the inclined surface, the support frame 83 moves outward to tighten the cylinder body. The second stroke switch 96 cooperates to detect whether the cylinder body is in contact with the support limit block 85 on the support plate 84. During this process, the cylinder body moves slightly, which can be ignored.

[0080] 7. The rightmost feeding cylinder 58 extends downward, causing the bushing pressing head 66 to coincide with the axis of the pressing rod 42, and the screw mechanism is activated, causing the bushing pressing head 66 to reach the right end point (i.e., the fifth proximity switch 106 at the rightmost end detects the detection piece 107), and then retract to the first pressing point position (i.e., the left side of the rightmost camshaft hole of the cylinder body);

[0081] 8. Start the electric cylinder 38, causing the pressure rod 42 to drive the pressure rod head 43 to move to the right. Press the bushing 82 into the camshaft hole on the right side of the cylinder body by tightening the bushing pressure head 66, and record the pressure-displacement curve.

[0082] 9. The rightmost feeding cylinder 58 retracts upward; the electric cylinder 38 controls the pressing rod 42 to return to the left, and controls the bushing pressing head 66 via the screw mechanism to reach the second pressing point (i.e., the left side of the second camshaft hole from right to left). The second feeding cylinder 58 from right to left extends downward, so that the bushing pressing head 66 and the axis of the pressing rod 42 coincide with each other. The electric cylinder 38 is activated, causing the pressing rod 42 to move to the right, and the bushing 82 is pressed into the second camshaft hole from right to left via the bushing pressing head 66. The pressure-displacement curve is recorded.

[0083] 10. Press-fit the remaining bushings 82 in sequence and record the pressure-displacement curve;

[0084] 11. After the press-fitting is completed, the transverse movement mechanism is reset, and the telescopic cylinder 87 in the support mechanism controls the driving slider 86 to move downward. Under the action of the third spring 94, the support plate 84 is reset, and the lifting mechanism controls the lifting plate 32 to descend and reset, and the cylinder body is transported to the next process.

[0085] The bushing pressing device achieves high-precision and automated installation of the bushing 82 through the cooperation of the roller, jacking mechanism, supporting mechanism, transverse movement mechanism, pressing mechanism, bushing feeding mechanism and various detection switches in the machine. The bushing 82 will not be under-installed during installation, and the production efficiency is greatly improved.

[0086] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bushing press-fitting device, characterized in that: It includes a frame, an inner roller for conveying the cylinder body is provided at the lower part of the frame, a lifting mechanism for lifting the cylinder body is provided below the inner roller, a lifting window is provided on the inner roller corresponding to the lifting mechanism, and a blocking mechanism for positioning the cylinder body is provided on the inner roller; A bushing feeding mechanism is provided on the frame above the jacking mechanism, the bushing feeding mechanism comprising a plurality of telescopic feeding arms arranged in an array and a bushing pressing head (66) provided at the lower end of the telescopic feeding arm for loading the bushing (82), the bushing pressing head (66) being in transverse sliding engagement with the end of the telescopic feeding arm, and an elastic component for automatically resetting the bushing pressing head (66) being provided between the bushing pressing head (66) and the telescopic feeding arm; The telescopic feeding arm comprises a first telescopic member fixedly mounted on the upper portion of the frame, a joint seat (61) connected to the lower end of the first telescopic member, and a bushing mounting frame (64) fixed to the lower end of the joint seat (61); a third guide sleeve (65) is provided at the lower end of the bushing mounting frame (64); and the bushing pressure head (66) is mounted in the third guide sleeve (65); A feeding guide mechanism is provided between the joint seat (61) and the first telescopic member, the feeding guide mechanism comprising a plurality of lifting guide rods (59) fixedly provided on the upper portion of the joint seat (61) and a feeding limit plate (62) fixedly connected to the upper ends of the plurality of lifting guide rods (59), the feeding limit plate (62) being slidably sleeved on the first telescopic member, and a limit column (6201) being fixedly provided at the bottom of the feeding limit plate (62); A pressure head guide rod (68) adapted to the third guide sleeve (65) is coaxially fixed on the bushing pressure head (66); the elastic component is arranged between the third guide sleeve (65) and the bushing pressure head (66), and the elastic component includes a first spring (78) whose two ends are respectively connected to the third guide sleeve (65) and the bushing pressure head (66) and a press-fitting limit mechanism arranged between the third guide sleeve (65) and the bushing pressure head (66), and a plurality of the first springs (78) are evenly arranged in the circumferential direction; A baffle (67) is provided at one end of the bushing pressure head (66) close to the third guide sleeve (65); a through hole (72), a detection hole (73) and a positioning hole (74) are provided on the cylindrical surface of the bushing pressure head (66); the positioning hole (74) is provided at the inner edge of the baffle (67); A cylindrical pin (7401) is provided in the positioning hole (74); a positioning assembly is provided in the through hole (72); and a probe cylinder (103) corresponding to the detection hole (73) is provided on the side of the bushing mounting frame (64); A pressing mechanism corresponding to the bushing pressing head (66) and a transverse movement mechanism for driving the pressing mechanism to move transversely are provided on one side of the bushing feeding mechanism on the frame, and a supporting mechanism for supporting the cylinder body is provided on the other side; the pressing mechanism includes a pressing rod (42) and a pressing driving mechanism for driving the pressing rod (42) to press the bushing pressing head (66).

2. A bushing press-fitting device according to claim 1, characterized in that: A feeding arm mounting frame (52) is fixedly provided on the upper portion of the frame, the first telescopic member is fixedly provided on the feeding arm mounting frame (52), a linear bearing (60) corresponding to the lifting guide rod (59) is fixedly provided on the feeding arm mounting frame (52); and an in-position detection mechanism for detecting the position of the feeding limit plate (62) is provided on the feeding arm mounting frame (52).

3. A bushing press-fitting device according to claim 2, characterized in that: The in-position detection mechanism comprises a detection block arranged on the side of the feeding limit plate (62) and a feeding detection device corresponding to the detection block, wherein the feeding detection device is arranged at positions on the frame corresponding to the upper end and the lower end of the first telescopic member.

4. The bushing press-fitting device according to claim 1, characterized in that: The roller conveyor in the machine comprises two roller shaft frames arranged in parallel and a short-axis roller (13) arranged inside the two roller shaft frames, a support sleeve (1302) corresponding to the roller shaft (1301) of the short-axis roller (13) is fixedly provided inside the roller shaft frames, and a sprocket is fixedly provided at the outer end of the roller shaft (1301); the gap between the short-axis rollers (13) on the two roller shaft frames forms the lifting window.

5. The bushing press-fitting device according to claim 1, characterized in that: The support mechanism comprises a support frame (83) fixedly arranged on the frame, a support plate (84) arranged inside the support frame (83), a driving slider (86) arranged between the support frame (83) and the support plate (84), and a support driving mechanism for driving the support plate (84) to move vertically, an elastic reset mechanism is provided between the support plate (84) and the support frame (83), and the opposing surfaces between the support plate (84) and the driving slider (86) are inclined planes that fit together; when the driving slider (86) moves vertically, it drives the support plate (84) to move horizontally.

6. A bushing press-fitting device according to claim 5, characterized in that: The elastic reset mechanism comprises a plurality of wedge guide shafts (91) fixed to the side of the support plate (84); a fourth guide sleeve (93) corresponding to the wedge guide shaft (91) is provided on the support frame (83); and a third spring (94) is provided on the outside of the wedge guide shaft (91) after the wedge guide shaft (91) passes through the fourth guide sleeve (93).

7. The bushing press-fitting device according to claim 1, characterized in that: The lifting mechanism includes a lifting mechanism and a lifting guide mechanism arranged at the lower part of the frame, a lifting plate (32) is installed on the top of the lifting mechanism, and the lifting guide mechanism includes a plurality of lifting guide rods (26) fixed to the bottom of the lifting plate (32) and a lifting guide seat (25) fixed on the frame and corresponding to the lifting guide rods (26). A detection ring (27) is provided at the lower end of the lifting guide rod (26), and a lifting detection device for detecting the position of the detection ring (27) is provided on the frame.

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